Terminal Device, Base Station, Method, and Recording Medium for Sidelink Communication

1. A terminal device comprising: circuitry configured to transmit transmission report information after transmitting a first data packet on a sidelink, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit the first data packet, wherein, in a case where the first data packet is transmitted without executing a predetermined procedure for packet collision prevention, the circuitry transmits the transmission report information.

2. The terminal device according to claim 1, wherein the predetermined procedure includes receiving allocation of a resource for transmission of the first data packet.

3. The terminal device according to claim 1, wherein the predetermined procedure includes executing predetermined sensing for packet collision prevention.

4. The terminal device according to claim 1, wherein the circuitry transmits the transmission report information by using a resource having a predetermined relationship in a time direction with a resource that is used to transmit the first data packet.

5. The terminal device according to claim 1, wherein the circuitry transmits the transmission report information on an Uu link and/or a sidelink.

6. The terminal device according to claim 1, wherein the transmission report information further includes at least any of information indicating a resource pool used to transmit the first data packet, information indicating a frequency band used to transmit the first data packet, information indicating a number of times transmission of the first packet is repeated, information indicating transmission power used to transmit the first data packet, information indicating priority of the first data packet, position information regarding the terminal device in the transmission of the first data packet, MCS (Modulation and Coding Scheme) information in the transmission of the first data packet, transmission mode information in the transmission of the first data packet, and QCL (Quasi-Colocation) information in the transmission of the first data packet.

7. The terminal device according to claim 1, wherein the first data packet includes a packet that is transmitted in a use case of ultra reliable and low latency communications (URLLC).

8. A terminal device comprising: circuitry configured to control transmission of a second data packet on a sidelink; control receipt of transmission report information after transmitting the second data packet on the sidelink; and control retransmission of the second data packet on a basis of the transmission report information received after transmitting the second data packet on the sidelink, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by another terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.

9. The terminal device according to claim 8, wherein, in a case where it is determined on the basis of the transmission report information that the first data packet and the second data packet have a collision, the circuitry retransmits the second data packet.

10. The terminal device according to claim 9, wherein the circuitry controls retransmission of the second data packet on a basis of whether or not a latency requirement for the second data packet is satisfied in a case where the second data packet is retransmitted.

11. A base station comprising: circuitry configured to control receipt of transmission report information after transmission of a second data packet on a sidelink by a second terminal device; and control retransmission of the second data packet by the second terminal device on a basis of the transmission report information, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by a first terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.

12. The base station according to claim 11, wherein, in a case where it is determined on the basis of the transmission report information that the first data packet and the second data packet have a collision, the circuitry transmits information to the second terminal device, the information being for issuing an instruction to retransmit the second data packet.

13. The base station according to claim 12, wherein the information for issuing the instruction to retransmit the second data packet includes information indicating a resource allocated for retransmission of the second data packet.

14. A method that is executed by a processor, the method comprising: transmitting transmission report information after transmitting a first data packet on a sidelink, the transmission report information including information expressly indicating time and a frequency of a resource used to transmit the first data packet, wherein, in a case where the first data packet is transmitted without executing a predetermined procedure for packet collision prevention, the transmission report information is transmitted.

15. A method that is executed by a processor, the method comprising: controlling transmission of a second data packet on a sidelink; controlling receipt of transmission report information after transmitting the second data packet on the sidelink; and controlling retransmission of the second data packet on a basis of the transmission report information after transmitting the second data packet on the sidelink, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by another terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.

16. A method that is executed by a processor, the method comprising: controlling receipt of transmission report information after transmission of a second data packet on a sidelink by a second terminal device; and controlling retransmission of the second data packet by the second terminal device on a basis of the transmission report information, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by a first terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.

17. A non-transitory computer-readable medium encoded with computer-readable instructions that, when executed by processing circuitry, cause the processing circuitry to perform a method comprising: transmitting transmission report information after transmitting a first data packet on a sidelink, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit the first data packet, wherein, in a case where the first data packet is transmitted without executing a predetermined procedure for packet collision prevention, the transmission report information is transmitted.

18. A non-transitory computer-readable medium encoded with computer-readable instructions that, when executed by processing circuitry, cause the processing circuitry to perform a method comprising: controlling transmission of a second data packet on a sidelink; controlling receipt of transmission report information after transmitting the second data packet on the sidelink; and controlling retransmission of the second data packet on a basis of the transmission report information after transmitting the second data packet on the sidelink, the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by another terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.

19. A non-transitory computer-readable medium encoded with computer-readable instructions that, when executed by processing circuitry, cause the processing circuitry to perform a method comprising: controlling receipt of transmission report information after transmission of a second data packet on a sidelink by a second terminal device; and controlling retransmission of the second data packet by the second terminal device on a basis of the transmission report information including information expressly indicating a time and a frequency of a resource used to transmit a first data packet by a first terminal device on the sidelink, wherein the transmission report information is received, in a case where the first data packet is received without executing a predetermined procedure for packet collision prevention.